Copyright © 2013 SCK•CEN MAX School - Frankfurt am Main – 1st -2nd October

2013

MYRRHA

Multipurpose hYbrid Research Reactor for High-tech Applications 

The RFQ@UCL R&D program 

Roberto Salemme

ADT - SCK•CEN

Copyright © 2013 SCK•CEN MAX School - Frankfurt am Main – 1st -2nd October

2013

MYRRHA LINAC - Why R&D?

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A conceptual design of an ADS-type high power proton linac has been initiated by EURATOM Framework Programmes 5 and 6 (PDS‐XADS and EUROTRANS projects)

The MYRRHA linac has a challenging reliability goal• less than 10 failures over a 3 month operation cycle (a failure

being identified as a beam trip longer than 3 sec)

R&D programs are now focused on:• Advanced beam dynamics and error studies• Reliability modeling• Optimization of the injector design and

construction• Prototype cryomodule design and operation

INJ@UCLCryomodules prototyping

Copyright © 2013 SCK•CEN MAX School - Frankfurt am Main – 1st -2nd October

2013

R&D program: roadmap

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today LEBT@UCLPhase 1

end 2014

RFQ@UCLPhase 2

end 2016

end 2018

INJ@UCLRT-CH phase

INJ@UCLSC-CH phase

Cryomodule prototypes

• engineering• construction• test

SC-CH spoke

Prod

elliptic

Prod

end 2020

EU-FP7MAX

Horizon 2020

Prod

Copyright © 2013 SCK•CEN MAX School - Frankfurt am Main – 1st -2nd October

2013

R&D line – Injector@UCL

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INJECTOR@UCLUp to 2014 and beyond - led by SCK•CEN

Goals • Test platform: experimentally address the injector design though prototyping

• tool for relevant reliability minded experience

Main topics:• Beam characterization• CW operation of the 4-rod

RFQ• SS RF amplifier – 160kW• Diagnostics for high current

beams• 3-tier Control System• Long reliability runs

Principal partners:• MAX Collaboration (especially WP1 and

WP2)• research institutes: IPNO, LPSC, IAP,

UCL/CRC, soon CERN• industries: Pantechnik, Cosylab

1.5 MeV 4.3 MeV 17.0 MeV

Copyright © 2013 SCK•CEN MAX School - Frankfurt am Main – 1st -2nd October

2013

R&D@UCL/CRC : general layout

5

General layout of the experimental test stand in UCL/Centre de Ressources du Cyclotron (CRC) at

Louvain-la-Neuve, Belgium: RFQ@UCL

Copyright © 2013 SCK•CEN MAX School - Frankfurt am Main – 1st -2nd October

2013

LEBT@UCL/CRC 

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Proton source by Pantechnik, financed by SCKCEN

LEBT design ongoing @ LPSC Grenoble, bilateral agreement SCKCEN – CNRS

RFQ interface section: design @ SCKCEN – UCL/CRC

Copyright © 2013 SCK•CEN MAX School - Frankfurt am Main – 1st -2nd October

2013

The proton source

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Pantechnik Monogan 1000ECR Ion souce – 30keV, 20mA

voltage 30 kV (40 kV capable)

beam current 20 mA DC

RF 2.45 GHz, 1200 W

transverse emittance @ 5 mA

0.1 π·mm·mrad RMS norm.

magnetic system Permanent Magnets

autonomous control system

NI CompactRIO

provisions for reliability/repairability

beam diagnostics devices incl.: Faraday Cup, Allison scanner

• ECR 2.45 GHz• multi-electrodes extraction system• flat magnetic profile configuration by

PMs• tapered axial RF injection

Copyright © 2013 SCK•CEN MAX School - Frankfurt am Main – 1st -2nd October

2013

The Low Energy Beam Transport (LEBT) line

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LPSC Grenoble 30 keV magnetic LEBT

Faraday cup

Allison scanner and beam profiler

2-axis collimation slits

Beam chopperback-up port

Solenoids + H/V steerers

Gas injectionports

Copyright © 2013 SCK•CEN MAX School - Frankfurt am Main – 1st -2nd October

2013

The Low Energy Beam Transport (LEBT) line

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Solenoid set + H/V steerersFull length = 260 mm

Outer diameter ~ 450 mm

Central field Bz(r=0,z=0)>

 0.25 T

Inner diameter with steerer

coils= 158 mm

End plate central hole

diameter= 157 mm

Solenoidal field integral>

 0.06 T.m

H,V steerer dipole field

integral

>

 

3.1∙10

-4T.m

Stray field ||B|| at (r=0,z=300)<

 3.3 mT

Stray field ||B|| at

(r=100,z=270)

<

 3.3 mT

Copyright © 2013 SCK•CEN MAX School - Frankfurt am Main – 1st -2nd October

2013

Beam delivery: reactor + ISOL@MYRRHA

t

t

ISOL extraction

kicker cycle

Chopper cycle

200 μs

5 μs 5 μs

4 ms (250 Hz)

5+a μs

5+b μs

and whenever the MPS triggers!

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Beam delivery:• for reactor subcritical monitoring 200

μs/250 Hz beam interruptions are required• using an extraction kicker, 600 MeV, 190

μs/250 Hz beam pulses become available for an ISOL@MYRRHA facility

Copyright © 2013 SCK•CEN MAX School - Frankfurt am Main – 1st -2nd October

2013

The electrostatic beam chopper

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SCK•CEN/UCL-CRC 5kV

electrostatic beam chopper

Copyright © 2013 SCK•CEN MAX School - Frankfurt am Main – 1st -2nd October

201312

Copyright © 2013 - SCKCEN

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